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Q.
The characters which appear in the first filial generation are called
Principles of Inheritance and Variation
Solution:
In heterozygous individuals or hybrids, out of the two factors or alleles representing the alternate traits of a character, one is dominant and expresses itself in the hybrid or $F_1$ generation. The other factor or allele is recessive and does not show its effect in the heterozygous individual (Principle of dominance).